JPS6247842A - Optical disk - Google Patents

Optical disk

Info

Publication number
JPS6247842A
JPS6247842A JP60187280A JP18728085A JPS6247842A JP S6247842 A JPS6247842 A JP S6247842A JP 60187280 A JP60187280 A JP 60187280A JP 18728085 A JP18728085 A JP 18728085A JP S6247842 A JPS6247842 A JP S6247842A
Authority
JP
Japan
Prior art keywords
parts
weight
recording
optical disk
compsn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP60187280A
Other languages
Japanese (ja)
Other versions
JPH0650574B2 (en
Inventor
Tetsuo Tajima
田島 哲夫
Hiroaki Miwa
広明 三輪
Ryoichi Sudo
須藤 亮一
Shinkichi Horigome
堀籠 信吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Maxell Ltd
Original Assignee
Hitachi Ltd
Hitachi Maxell Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Maxell Ltd filed Critical Hitachi Ltd
Priority to JP60187280A priority Critical patent/JPH0650574B2/en
Priority to US06/879,013 priority patent/US4668550A/en
Priority to EP19860108789 priority patent/EP0213307A3/en
Publication of JPS6247842A publication Critical patent/JPS6247842A/en
Publication of JPH0650574B2 publication Critical patent/JPH0650574B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Abstract

PURPOSE:To stabilize the performance of an optical disk by using a resin curable by UV rays compounded with a compsn. having specific structure to form an underlying layer for a recording film layer. CONSTITUTION:The recording layer is formed via the underlying layer on a transparent substrate. The resin compsn. curable by UV rays is held in place between the substrate consisting of glass, etc. and an Ni stamper having grooves and pits. The compd. prepd. by compounding 0.1-5.0pts.wt. photopolymn. initiator with 100pts. mixture composed of 20-80pts.wt. compd. expressed by the formula I and 80-20pts.wt. compd. expressed by the formula II is used for the above-mentioned compsn. After such resin compsn. is cured by the irradiation of the UV rays, the stamper is stripped, then the rugged parts on the stamper are exactly transferred onto the surface of the cured resin compsn. The recording film is deposited by evaporation on the rugged resin surface, by which an optical disk is formed. The optical disk has the characteristics such as high recording sensitivity, high density and high reliability.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は光ディスクに係り、とくにデジタルオーディオ
ディスク、光学式ビデオディスク。
DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to optical discs, particularly digital audio discs and optical video discs.

メモリーディスクなどの如く光で読みとる方式の光ディ
スクに関するものである。
This relates to optical discs that can be read using light, such as memory discs.

〔発明の背景〕[Background of the invention]

従来よりディスクはたとえば第1図に示すようにガラス
、透明プラスチックス(ポリメチルメタクリレート、ポ
リカーボ坏−トなど)などの透明基体1と、この上に形
成されたサーボトラック用などの溝状や穴状の凹凸を有
する下地層2と、この下地層2の上に形成されたBi、
In。
Conventionally, a disk has, for example, a transparent substrate 1 made of glass, transparent plastic (polymethyl methacrylate, polycarbonate, etc.) as shown in FIG. A base layer 2 having irregularities of the shape, Bi formed on this base layer 2,
In.

Tシ、5e、As、Ph、Sn系などの記録用金属膜3
とからなる元ディスク基板二枚を、きょう体4で記録用
金属膜6が互いに一定間隔で対向するように保持し、こ
のきょう体と透明基体間を接着剤(図示せず)で封着さ
せたものである。
Recording metal film 3 of T-, 5e, As, Ph, Sn-based, etc.
Two original disk substrates consisting of are held in a housing 4 so that the recording metal films 6 face each other at a constant interval, and the housing and the transparent substrate are sealed with an adhesive (not shown). It is something that

そして、光ビームを記録用金属膜5上に照射し、照射部
分の記録用金属膜を除去し、情報の単位としている。
Then, a light beam is irradiated onto the recording metal film 5, and the irradiated portion of the recording metal film is removed to form a unit of information.

このような光ディスクは従来よシ第2図(α)〜(c)
に示すように製造されている。すなわち、所定の凹凸を
有するニッケルなどの金属製スタンバ5と透明基体1と
の間に紫外線硬化型レジンをはさみ込み、これを紫外線
硬化させて、下地層2を形成しく第2図(、) ’) 
、金属製スタンバ5をはがしく第2図(b))、凹凸を
有する下地層の上に記録用金属膜3を形成しく第2図(
C))、これら2枚の光デイスク基板を、きょう体によ
り記録用金属膜が互いに一定間隔になるようにして対向
させ、きょう体と光デイスク基板を接着して得ていた。
Conventionally, such optical discs are as shown in Figures 2 (α) to (c).
Manufactured as shown. That is, an ultraviolet curable resin is sandwiched between a metal stand 5 made of nickel or the like having predetermined irregularities and a transparent substrate 1, and this is cured by ultraviolet rays to form a base layer 2. )
Then, the metal stand bar 5 is peeled off (FIG. 2(b)), and the recording metal film 3 is formed on the uneven underlayer (FIG. 2(b)).
C)) These two optical disk substrates were made to face each other with a housing so that the recording metal films were spaced apart from each other, and the housing and the optical disk substrate were bonded together.

上記の下地層に用いる紫外線硬化レジン組成物は、次の
諸条件を満たさなければならない。
The ultraviolet curable resin composition used for the above-mentioned underlayer must satisfy the following conditions.

すなわち、 (イ)硬化物が光学的に透明であること。That is, (a) The cured product must be optically transparent.

(ロ) ガラス、透明プラスチックなどの透明基板に良
く接着すること。
(b) Must adhere well to transparent substrates such as glass and transparent plastic.

(ハ) スタンバとはく離し易いこと。(c) It should be easy to separate from the stand bar.

に) 光ビームの照射により記録用金属膜が速かに溶融
して除去され丸い良好な穴があき易いこと。
b) The recording metal film is quickly melted and removed by the irradiation of the light beam, making it easy to form a good round hole.

(ホ)長期間使用によって吸湿によシ記録用金属膜の形
状が変化したり、金属膜が膨潤しクラックを発生するよ
うなことがないこと。また吸湿によフ硬化物から溶出し
た腐食性物質が記録用金属膜を酸化し、金属膜の透過率
を増大するようなことがないこと。すなわち、吸湿環境
下においても、記録した信号を正確に読みとれること。
(E) The shape of the recording metal film will not change due to moisture absorption or the metal film will not swell and crack due to long-term use. Further, corrosive substances eluted from the hardened material due to moisture absorption should not oxidize the recording metal film and increase the transmittance of the metal film. In other words, recorded signals can be read accurately even in a humid environment.

(へ)記録用金属膜を蒸着した凹凸の溝の熱安定性が優
れ、溝の深さや形状が変化せず、また金属膜にクラック
が発生しないこと。
(f) The uneven grooves in which the recording metal film is deposited have excellent thermal stability, the depth and shape of the grooves do not change, and the metal film does not develop cracks.

())  500rpm以上の高速回転に耐える機械強
度のあること。
()) Must have mechanical strength that can withstand high-speed rotation of 500 rpm or more.

が必要である。is necessary.

しかし、従来の紫外線硬化レジン組成物は、上記(イ)
〜(ト)の条件を同時に満たさなかった。
However, conventional ultraviolet curable resin compositions are
- (g) conditions were not simultaneously met.

代表的な従来例は、光ディスクに関する特開昭56−1
27946号がある。
A typical conventional example is Japanese Patent Laid-Open No. 56-1 regarding optical discs.
There is No. 27946.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、上記した従来技術の欠点をなくし、性
能の安定した光ディスクを提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide an optical disc with stable performance.

〔発明の概要〕[Summary of the invention]

本発明は前記の目的を達成するため、下地層に下記一般
式(1)で示される化合物20〜80重量部、下記一般
式(2)で示される化合物80〜20重量部よpなる混
合物100重量部と、この混合物100重量部に対して
光重合開始剤01〜5.0重量部を配合した紫外線硬化
型レジン組成物を硬化させたものを用いることを特徴と
するものである。
In order to achieve the above object, the present invention provides a base layer containing 20 to 80 parts by weight of a compound represented by the following general formula (1) and 80 to 20 parts by weight of a compound represented by the following general formula (2). This method is characterized by using a cured ultraviolet curable resin composition containing 0.1 to 5.0 parts by weight of a photopolymerization initiator per 100 parts by weight of this mixture.

CHs CH3、、、、、、、、、(+1(但し、R,
、R,は水素又はメチル基。
CHs CH3, , , , , , (+1 (However, R,
, R, is hydrogen or a methyl group.

ルは整数で n = 5〜12) 配合量は上記一般式(11の化合物が80重量部よυ多
いと、スタンバとの離型性、硬化物の耐湿性、耐熱性が
低下する。また、上記一般式(1)の化合物が20重量
部より少ないと、硬化収縮にょシ成型歪が大きくなると
ともに、硬化物はもろくない機械強度の弱いものとなる
(where n is an integer and n = 5 to 12) The compounding amount is the above general formula (If the compound of 11 is more than 80 parts by weight, the releasability from the stand bar and the moisture resistance and heat resistance of the cured product will decrease. If the amount of the compound of the general formula (1) is less than 20 parts by weight, molding distortion due to curing shrinkage will increase, and the cured product will not be brittle and have low mechanical strength.

さらK、上記組成物を速かに硬化するのに必要な光重合
開始剤としては、たとえば以下に示すようなものが有効
である。すなわち、ベンジル類。
Further, as the photopolymerization initiator necessary for rapidly curing the above composition, for example, those shown below are effective. In other words, benzyls.

ベンゾイン、ベンゾインエチルエーテル、ベンゾインイ
ソプロピルエーテル、ベンゾインイソブチルエーテルな
どのベンゾイン類。
Benzoins such as benzoin, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether.

1−ヒドロキシシクロヘキシルベンゾフェノンなどのベ
ンゾフェノン類。
Benzophenones such as 1-hydroxycyclohexylbenzophenone.

アセトフェノン類。Acetophenones.

2−クロロチオキサントン、2−メチルチオキサント/
などのチオキサントン類。
2-chlorothioxanthone, 2-methylthioxanthone/
Thioxanthone such as.

2−エチルアントラキノン、2−メチルアントラキノン
などのアントラキノン類。
Anthraquinones such as 2-ethylanthraquinone and 2-methylanthraquinone.

ベンジルジメチルケタールなどのベンジルケタール類。Benzyl ketals such as benzyl dimethyl ketal.

などである。光重合開始剤の配合量は上記一般式(11
と(2)の合計100重量部に対して0.1〜5.0重
量部が有効である。0.1重量部よシ少ないと反応性が
低下し硬化物の諸特性が低下する。また。
etc. The amount of the photopolymerization initiator is determined by the above general formula (11
0.1 to 5.0 parts by weight is effective for a total of 100 parts by weight of (2) and (2). If the amount is less than 0.1 part by weight, the reactivity will decrease and the properties of the cured product will deteriorate. Also.

50重量部より多いと反応が速すぎ発熱が大きく硬化物
にクラックを発生したり不均一に硬化し諸特性が低下す
る。
If the amount is more than 50 parts by weight, the reaction is too fast and heat generation is large, causing cracks in the cured product or uneven curing, resulting in deterioration of various properties.

なお、上記光重合開始剤は単独もしくは二種類以上混合
して用いる。
The above photopolymerization initiators may be used alone or in combination of two or more.

また、粘度調節、硬度調節、熱膨張係数の調節、吸湿性
の低減、スタンバとのはく離性向上などを目的として、
例えば以下に示すようなアクリレートやメタクリレート
を用いても良い。
In addition, for the purpose of adjusting viscosity, hardness, thermal expansion coefficient, reducing hygroscopicity, and improving releasability from the stand bar,
For example, acrylates and methacrylates shown below may be used.

すなわち、ラウリルアクリレート、ラウリルメタクリレ
ート、トリデシルメタクリレート、インボルニルアクリ
レート、イソボルニルメタクリレート、トリメチロール
エタントリアクリレート、トリメチロールエタントリメ
タクリレート、トリメチロールプロパントリアクリレー
ト。
Namely, lauryl acrylate, lauryl methacrylate, tridecyl methacrylate, inbornyl acrylate, isobornyl methacrylate, trimethylolethane triacrylate, trimethylolethane trimethacrylate, trimethylolpropane triacrylate.

トリメチロールエタントリアクリレートなどが有用であ
る。
Trimethylolethane triacrylate and the like are useful.

これらは、単独もしくは二種類以上混合して用いる。配
合割合は前記一般式(1)と(2)の合計100重量部
に対してO〜40重蓋部である。
These may be used alone or in combination of two or more. The blending ratio is 0 to 40 parts by weight based on the total of 100 parts by weight of the general formulas (1) and (2).

さらに、上記レジンの吸湿時の接着性をさらに安定化す
るために1例えば以下に示すようなシランカップリング
剤を添加することができる。
Furthermore, in order to further stabilize the adhesion of the resin when it absorbs moisture, a silane coupling agent such as the one shown below can be added.

すなわち、γ−アクリロキシプロピルトリメトキシシラ
ン、γ−メタクリロキシプロピルトリメトキシシラン、
ビニルトリメトキシシラン。
That is, γ-acryloxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane,
Vinyltrimethoxysilane.

ビニルトリエトキシシラン、N−β−(N−ビニルベン
ジルアミノ)エチル−γ−アミノフロビルトリメトキシ
シラン・モノハロゲンクロライドなどが有用である。こ
れらは単独もしくは二種類以上混合して使用する。配合
割合は前記一般式(1)と(2)の合計100重量部に
対して0〜6.0重量部である。
Vinyltriethoxysilane, N-β-(N-vinylbenzylamino)ethyl-γ-aminofurobiltrimethoxysilane monohalogen chloride, and the like are useful. These may be used alone or in combination of two or more. The blending ratio is 0 to 6.0 parts by weight based on the total of 100 parts by weight of the general formulas (1) and (2).

〔発明の実施例〕[Embodiments of the invention]

以下1本発明を実施例に基いて更に詳述する。 The present invention will be explained in more detail below based on examples.

前記一般式(2)で示される紫外線硬化型レジン成分は
、以下(,4) 、 <E)の化学式で表わされるも 
 (のを用いた。
The ultraviolet curable resin component represented by the general formula (2) is also represented by the following chemical formula (,4), <E).
(I used the.

壕だ、比較例には本発明用成分(前記一般式(11、+
21のもの)の配合範囲を越えたものの他に以下の(X
) 、 (Y) 、 (Z)の化学式で表わされるもの
を用いた。
However, the comparative example includes the component for the present invention (the general formula (11, +
In addition to those exceeding the blending range of (21), the following (X
), (Y), and (Z) were used.

【 OO (分子量:約400) 堝 CBs0 ・・・0’) 次に、レジン硬化物の各種特性の測定法を以Fに示す。[ OO (Molecular weight: approx. 400) Basin CBs0 ...0') Next, methods for measuring various properties of the cured resin product are shown below in F.

l) 記録感度ニガラス基体の光ディスクを用いて信号
を記録した。下記の条件でレーザ光ビームをTt系記録
膜に照射して溶融して除去し記録膜に直径約1μmの丸
い良好な穴があき、実用に耐えるものを「○」、穴がき
れいにあかず実用に耐えないものを「×」とした。
l) Recording Sensitivity Signals were recorded using a glass-based optical disc. Under the following conditions, the Tt-based recording film is irradiated with a laser beam to melt and remove it, and a good round hole with a diameter of about 1 μm is formed in the recording film, and a mark "○" indicates that the hole is not clean and is suitable for practical use. Items that could not withstand were marked with an “×”.

ディスク回転数: 960rP扉 記録周波数  :2゜5 MB2 半導体レーザ :波長8301m 記録パワー  2約7mF(膜面) 2) 耐湿性:60°0,95%RE中、100時間光
ディスクを放置して判定した。
Disc rotation speed: 960rP Door recording frequency: 2°5 MB2 semiconductor laser: Wavelength 8301m Recording power: 2 approx. 7mF (film surface) 2) Humidity resistance: Judgment was made by leaving the optical disc in 60°0, 95% RE for 100 hours. .

吸湿によって、記録用金属膜の溝の形状変化や、金属膜
膨潤による膜面クラック発生。
Moisture absorption changes the shape of the grooves in the recording metal film and causes cracks on the film surface due to swelling of the metal film.

レジン硬化物から溶出する腐食性物質による金属膜の酸
化で生ずる金属膜の透過率増大などが起らず実用に耐え
るものを「○」、上記変化を生じ実用に耐えないものを
「×」とした。
Those that can withstand practical use without an increase in the transmittance of the metal film caused by oxidation of the metal film by corrosive substances eluted from the cured resin product are marked as "○", and those that cause the above changes and cannot withstand practical use are marked as "x". did.

(3)  耐熱性: 100’0 、4時間 光ディス
クを放置して判定した。
(3) Heat resistance: 100'0, 4 hours. Judgment was made by leaving the optical disc for 4 hours.

記録用金属膜を蒸着した凹凸の溝の熱安定性が優れ、溝
の深さや形状が変化せず、金属膜にクラックが発生しな
い実用に耐えるものを「○」、上記変化を生じ実用に耐
えないものを「×」とした。
``○'' indicates that the uneven grooves on which the recording metal film is vapor-deposited have excellent thermal stability, the depth and shape of the grooves do not change, and no cracks occur in the metal film, making them durable for practical use. Items that were not included were marked with an “×”.

(4)光透過率:厚さ1簡のレジン板を作り、分光光度
計で830nmの光の透過率を測定して求めた。
(4) Light transmittance: The transmittance of light at 830 nm was determined by making a resin plate with a thickness of 1 sheet and measuring the transmittance of light at 830 nm using a spectrophotometer.

(5)  引張)強さ:光ディスクが5001pm以上
の高速回転に耐える機械強度の目安として必要なもので
、レジン硬化物について250°CでJISK6911
に準じて求めた。
(5) Tensile strength: This is necessary as a guideline for the mechanical strength with which an optical disc can withstand high-speed rotation of 5001 pm or more.
It was calculated according to.

(6)  接着性二元ディスクを60’0.95%RH
中100時間放置した後、あるいは100°0,4時間
加熱した後に、ガラスまたは透明プラスチック(エポキ
シ系、アクリル系)などの透明基体と接着していて実用
上問題がないものを「○」問題があるときを「×」とし
た。これに使用したレジン組成を第1表に示す。A1−
12は本発明の実施例であ、jl)、415〜22は比
較例である。
(6) Adhesive binary disc at 60'0.95%RH
After being left at 100° for 100 hours or heated at 100° for 4 hours, those that have adhered to a transparent substrate such as glass or transparent plastic (epoxy or acrylic) and have no practical problems are marked as ``○''. A certain time was marked as "x". Table 1 shows the resin composition used for this. A1-
12 is an example of the present invention, jl), and 415 to 22 are comparative examples.

以下余白 これら紫外線硬化型レジン組成物を紫外線硬化した場合
の特性を第2表にまとめた。なお、上記特性の5えでi
o 、 f2+ 、 (3) 、 (6)の特性は実機
を用いて測定した。すなわち、溝およびビットを有する
ニッケルスタンバと直径300.、厚さ120のガラス
板との間に第1表に示す組成屋1〜22の紫外線硬化レ
ジン組成物をはさみ込み1oy/−rd (2〜2oy
/−、好ましくは5〜15v/−)で加圧した後、高圧
水銀灯で150mF/ad(50〜400 mM’/c
al 、好ましくは100〜250mW/d)の紫外線
を照射してレジン組成物を硬化させた。そして、方ラス
板をスタンバからはがしたところスタンバと硬化した紫
外線硬化型レジン組成物との間ではがれ、硬化した紫外
線硬化型レジン組成物面上にはスタンバ上の凹凸加工部
が正確に転写された。
Table 2 below summarizes the properties of these UV-curable resin compositions when UV-cured. In addition, the above characteristic 5e
The characteristics of o, f2+, (3), and (6) were measured using an actual machine. That is, a nickel stump bar with a groove and a bit and a diameter of 300. , the ultraviolet curable resin compositions of compositions 1 to 22 shown in Table 1 were sandwiched between a glass plate having a thickness of 120 mm and a 1 oy/-rd (2 to 2 oy
/-, preferably 5 to 15 v/-), and then 150 mF/ad (50 to 400 mM'/c) with a high-pressure mercury lamp.
The resin composition was cured by irradiating ultraviolet rays of 100 to 250 mW/d). When the square board was removed from the stanbar, it peeled off between the stanbar and the cured ultraviolet curable resin composition, and the irregularities on the stanbar were accurately transferred onto the surface of the cured ultraviolet curable resin composition. It was done.

ガラス板に接着したレジンの凹凸面上にT−系記録膜を
蒸着法により約250ノの厚さに付着せしめた後、二枚
を記録膜面を向い合わせにして約1111111の空間
をと9ながらガラス板周辺部分をエポキシ系接着剤を用
いて接着し、光ディスクを作成し、実機の特性を求めた
After adhering a T-based recording film to a thickness of about 250 mm by vapor deposition on the uneven surface of the resin adhered to a glass plate, the two sheets were placed with their recording film surfaces facing each other, leaving a space of about 1111111 mm. The surrounding area of the glass plate was then glued using epoxy adhesive, an optical disc was created, and the characteristics of the actual device were determined.

以  下  余  白 第1表と第2表を比較すると、本発明の一般式(1)で
示される化合物が20重+11部より少ない比較例A 
I3.15は、ともに引張り強さが実施例屋1〜12に
比べて悪く、もろいものであった。また、一般式(1)
で示される化合物が80重量部より多い比較例AI4.
16は、ともに耐湿性、耐熱性が実施例A1〜12に比
べて悪く、スタンパとの離型性も悪いものであった。
Comparing Table 1 and Table 2 below, Comparative Example A contains less than 20 parts + 11 parts of the compound represented by the general formula (1) of the present invention.
I3.15 had poor tensile strength compared to Examples 1 to 12 and was brittle. Also, general formula (1)
Comparative Example AI4. containing more than 80 parts by weight of the compound represented by
Sample No. 16 had both poor moisture resistance and heat resistance compared to Examples A1 to 12, and also had poor releasability from the stamper.

また、光重合開始剤の配合量が本発明範囲よシ少ない比
較例A17と多い比較例418は、ともに実施例A1〜
12に比べて耐湿性だけでなく耐熱性、引張り強さ、接
着性も著しく劣るものであった。
In addition, Comparative Example A17 and Comparative Example 418, in which the amount of photopolymerization initiator contained is smaller than the range of the present invention, and Comparative Example 418 are both Examples A1 to
Compared to No. 12, it was significantly inferior not only in moisture resistance but also in heat resistance, tensile strength, and adhesiveness.

また、従来品を用いた比較例419.21は、記録感度
、耐湿性、耐熱性、接着性が実施例A1〜12に比べて
著しく劣るものであった。さらに従来品を用いた比較例
420.22は、記録感度。
Moreover, Comparative Example 419.21 using a conventional product was significantly inferior to Examples A1 to A1-12 in recording sensitivity, moisture resistance, heat resistance, and adhesiveness. Furthermore, Comparative Example 420.22 using a conventional product has a recording sensitivity.

耐湿性、耐熱性が実施例A1〜12に比べて著しく劣る
ものであった。
The moisture resistance and heat resistance were significantly inferior to those of Examples A1 to A1-12.

すなわち、これらのすべての特性を満足する紫外線硬化
型レジン組成物は実施例A1〜12のものであり、光デ
ィスクとしての実機の動作特性、寿命特性を満足するレ
ジン組成物は実施例のA1−12のみであった。
That is, the ultraviolet curable resin compositions that satisfy all of these characteristics are those of Examples A1-12, and the resin compositions that satisfy the operating characteristics and life characteristics of the actual device as an optical disk are those of Examples A1-12. It was only.

〔発明の効果〕〔Effect of the invention〕

以上述べたように1本発明によれば下地層に上記した紫
外線硬化型レジン組成物を硬化したものを用いることに
よシ高記録感度、高密度。
As described above, according to the present invention, high recording sensitivity and high density can be achieved by using a cured ultraviolet curable resin composition as described above for the underlayer.

高信頼性の光ディスクが得られる。A highly reliable optical disc can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明が適用される光ディスクの説明図、第2
図は第1図の光ディスクの作製方法を示す説明図である
FIG. 1 is an explanatory diagram of an optical disc to which the present invention is applied;
The figure is an explanatory diagram showing a method for manufacturing the optical disc of FIG. 1.

Claims (1)

【特許請求の範囲】 透明基体と、その上に設けられた情報信号と対応した凹
凸を有する下地層と、この上に設けられた記録膜層が順
次積層されてなる光ディスクにおいて、上記下地層が下
記の一般式(1)で示される化合物20〜80重量部、
下記の一般式(2)で示される化合物80〜20重量部
よりなる混合物100重量部と、この混合物100重量
部に対して光重合開始剤0.1〜5.0重量部を配合し
た紫外線硬化型レジン組成物を硬化させたものであるこ
とを特徴とする光ディスク。 ▲数式、化学式、表等があります▼・・・(1) ▲数式、化学式、表等があります▼・・・(2) (但し、R_1、R_2は水素又はメチル基、nは整数
でn=5〜12)
[Claims] An optical disc comprising a transparent substrate, an underlayer provided thereon having unevenness corresponding to an information signal, and a recording film layer provided thereon, wherein the underlayer is 20 to 80 parts by weight of a compound represented by the following general formula (1),
An ultraviolet curing product containing 100 parts by weight of a mixture consisting of 80 to 20 parts by weight of a compound represented by the following general formula (2) and 0.1 to 5.0 parts by weight of a photopolymerization initiator to 100 parts by weight of this mixture. An optical disc characterized by being made of a cured mold resin composition. ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(2) (However, R_1 and R_2 are hydrogen or methyl groups, n is an integer, and n= 5-12)
JP60187280A 1985-08-28 1985-08-28 Light disk Expired - Lifetime JPH0650574B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP60187280A JPH0650574B2 (en) 1985-08-28 1985-08-28 Light disk
US06/879,013 US4668550A (en) 1985-08-28 1986-06-26 Optical disc
EP19860108789 EP0213307A3 (en) 1985-08-28 1986-06-27 Optical disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60187280A JPH0650574B2 (en) 1985-08-28 1985-08-28 Light disk

Publications (2)

Publication Number Publication Date
JPS6247842A true JPS6247842A (en) 1987-03-02
JPH0650574B2 JPH0650574B2 (en) 1994-06-29

Family

ID=16203231

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60187280A Expired - Lifetime JPH0650574B2 (en) 1985-08-28 1985-08-28 Light disk

Country Status (1)

Country Link
JP (1) JPH0650574B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6242101B1 (en) 1998-04-02 2001-06-05 Basf Aktiengesellschaft Radiation-curable formulations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6242101B1 (en) 1998-04-02 2001-06-05 Basf Aktiengesellschaft Radiation-curable formulations

Also Published As

Publication number Publication date
JPH0650574B2 (en) 1994-06-29

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